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<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      var arr = [
        [1, 2, 3],
        [4, 5, 6],
        [7, 8, 9],
      ];

      // arr[0][0]  数组的连续获取
      console.log(arr[0][2]);
    </script>
  </body>
</html>
